Fuel Boost Pumps

[billsheila]

My bird is in for annual at the moment and I am discussing fuel boost pumps with my mechanic. Based on logs it appears my left wing pump may be original (so 43 years old) and the right wing pump was replaced at one point so is 28 years old. Both had shaft seals done about 12 years ago. Neither leak and they work fine. TT in service for the original one is 2500 hours, I can't recall on the one that was replaced.

Apparently there was a service bulletin to replace the vanes in these pumps because they were breaking up, so the replacement was to "nyletron" vanes or some such name. Can't tell if this SB was ever done.

My mechanic (somewhat surprisingly to me) doesn't seem too concerned about doing anything to these pumps, "they work, they are not leaking, so leave them alone" mentality.

Of course he will change them or have them checked if I want to do it. I am looking for opinion and advice on this, experience others have had with pumps, etc?

Thanks